Charbagh or Chahar Bagh (Persian: چهارباغ, chahār bāgh, "Four Bāghs") is a Persian-style garden layout. The quadrilateral garden is divided by walkways or flowing water into four smaller parts. In Persian, "Chār" means 'four' and "bāgh" means 'garden'.

One of the hallmarks of Islamic gardens is the four-part garden laid out with axial walkways that intersect in the garden center. This highly structured geometrical scheme, called the chahar bagh, became a powerful metaphor for the organization and domestication of the landscape, itself a symbol of political territory.

The Chahrbagh-e Abbasi (or Charbagh Avenue) in Isfahan, Iran, built by Shah Abbas the Great in 1596, and the garden of the Taj Mahal in India are the most famous examples of this style. In the Charbagh at the Taj Mahal, each of the four parts contains sixteen flower beds.

Chahrbagh originated from the time of Achaemenid Persia. Greek historians, such as Herodotus and Xenophon, give extensive accounts of Cyrus the Great's palatial city of Pasargadae and his four-gardens.